using the search bar if you type in retrofit there should be quite a few write ups. i dont think you will find any that pertain to the uk focus, but the process is the same. basically take the light housing off the car and put it in the oven. bake at a certain temp and using some screw drivers and a putty knife you separate the housing. the projector slides in from the front into the spot the bulb used to be in. it all secures with a big nut on the back side of where the bulb went in. then all you do is either use some more heat or an adhesive and affix the lens back onto the housing. there is a special harness that prevents the bulb out indicator. its all plug and play. you dont need to do any cutting of the wires.
2008 Vista Blue SES Coupe 5spd FRPP Zx3B Suspension
5000K D2S Retrofit
130,000+ miles and still on factory brakes and clutch!
Rep Points dont add themselves